Sectional boiler.



J. B. BERNHARD. SEGTIONAL BOILER.- APPLICATION FILED MAR. 19, 1913.

1,089,996. Pa tented Dec. 30, 1913.

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J. B. BERNHARD.

SEGTIONAL BOILER. APPLICATION FILED MAR 19, 1913.

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J. B. BERNHARD. SECTIONAL BOILER. APPLICATION IILED MAR. 19, 1913.

Patented Dec. 30, 1913.

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JOHN B. BERNHARD, OF SYRACUSE, NEW YORK.

SECTIONAL BOILER.

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Specification of Letters yatent.

Patented Dec. so, rare.

Application filed March 19, 1913. Serial No. 755,300.

To all whom it may concern:

Be it known that I, J OHN B. Bnnxnxnn, a citizen of the United States, residing at Syracuse, in the county of Onondaga and State of New York, have invented a certain new and useful Improvement in Sectional Boilers, of which the following is a full, clear, and exact description.

The object of this invention is to provide a sectionalboiler of high efiiciency and small cost, and one which shall occupy relatively small head space.

The invention consists in the construction and combination of parts hereinafter described and pointed out definitely in the claims.

In the drawing, Figure 1 is a front elevation of a sectional boiler which embodies the invention. Fig- 2 is an end view thereof. Fig. 3 is a vertical section in the plane indicated by line 33 on Fig. 4. Fig.- 4 is a sectional view of the boiler, the section being between two of the so-called intermediate sections D. Fig. 5 is a sectional view through one of said intermediate sections in the plane indicated by line 55 on Fig. 4. Fig. 6 is an inside elevation of the left end section. Fig. 7 is a sectional View in the plane indicated by line 77 on Fig. 6. Fig. 8 is an insideview of the right end section; and Fig. 9 is a sectional view thereof in the plane indicated by line 99 on Fig. 8.

The boiler includes two end sections A and B. and a plurality of intermediate sections D. When these sections are secured together they rest upon the side and rear walls C of the ash pit, and they form the sides, topand rear walls of the fire box F. The front wall L of the fire box may be of any suitable construction capable of serving the stated purpose.

It will be understood, of course, that each end section and each intermediate section are hollow in order that they may contain the water to be heated. These sections, when connected together by any suitable means communicate freely with one another through openings 11 and 12.

Each intermediate section D comprises a substantially horizontal top member d and a rear member. The rear member comprises a substantially vertical rear water leg d a front water leg (Z which is somewhat inclined forward from its lower end to its upper end where it joins the top member cl,

. and an intermediate water leg (Z which is inclined in the same direction as but in a greater degree than the front water leg. This intermediate water leg divides the space between the front and rear water legs into approximately triangular transverse flues 13, 14, which lie one behind the other. These three water legs are united at their lower ends to form the pedestal (Z*. The front water legs are narrowed, near their upper ends, as shown in Fig. 5, thereby leaving openings 15 between adjacent water legs through which the products of combustion may flow from the fire box into the front flue 13. There are also three water legs E, E E which extend diago nally downward and rearward from the top member (Z across the fire box to the water leg (Z to which they are joined. These water legs are of different widths, as shown in Fig. 5, the upper one being widest and the middle one the next widest, so that they may all present about the same surface to the direct action of the heated products of combustion flowing to opening 15; and they also, in a large measure, guide said products into said opening.

The two end sections have respectively the thick portions a and l), which correspond in outline with the external shape of the intermediate sections; and also the thin portions (1 12 which serve as the side walls of the fire box. In the thick portion of the end member A is a transverse flue 16 which at its inner end,that is adjacent to the next intermediate sections, is large enough to cover the ends of both flues 13 and 14. This flue 16 tapers, as shown in Fig. 7, to a rela tively small sizedhole at the outer face of said section, and this hole is covered by a plate G carrying a door 9 which, when open, gives access to the transverse flues 13, 14 and 16, in order that theymay be cleaned. The fine 16 serves as a communicating flue with the twotransverse flues 13 and 14. In the thick rear part of the end member B is also a transverse flue 17 which at its inner end, that is adjacent to the next intermediate member B, is of a size such that it communicates only with the rear flue 14 in said intermediate member. This flue 17 as it extends transversely through member B is narrowed and changed in shape so that at the outer face of said member it is substantially circular. A plate J is secured to the outer face of the member B, and it partly covers this hole, and this plate J is shaped so as to facilitate the connection therewith of the usual smoke pipe. The hot products of combustion pass through the openings 15 into the flue 13, and thence into flue 16. They then enter flue 14 and flow transversely to the discharge end of said flue.

The location of the two flues 13 and 14, one behind the other in the wide rear member, has much to do with imparting to the boiler a number of very desirable characteristics. In the first place it permits the boiler sections to be made so as to occupy less space, measured vertically than does, I believe, any sectional boiler which has before been made of like capacity. Free circulation of the water is also assured, because obviously the products of combustion will have been cooled to some extent before they reach the rear transverse flue 14. The water will flow up through the water legs E, E E and the front water leg (Z and after their discharge into the top member, which serves as the crown sheet of the fire box, they will flow rearwardly and then down through the water legs (Z (Z into the pedestal. It will be noted also that the tubes through which the hot water flows upward present no vertical passageways through which bubbles of steam, when formed, may flow, and in flowing acquire a momentum such as to cause them to burst out through the top of the water in the member D and thereby cause foaming, which is an undesirable characteristic of operation of many sectional boilers. With the construction shown, the bubbles of steam, if formed in the tubes E, E E or the water leg (Z will be retarded in their upward movement by the inclined walls of said tubes and to a very large extent this will prevent foaming. Additionally the large area of the member D affords a large liberating space for the steam bubbles and this has quite a bit to do with the prevention of foaming.

Having described my invention, I claim;

1. An intermediate section for sectional boilers, comprising a substantially horizontal top member, and a wide rear member which communicates with the top member and is composed of a substantially vertical rear water leg, an inclined front water leg, and a more inclined intermediate water leg, which divides the space between thefront and rear water legs into two transverse flues which are located one behind the other, and a pedestal with which the lower ends of said three water legs are united,the front water leg being narrowed near its upper end to water legs into two transverse flues which are located one behind the other, and a pedestal with which the lower ends of said three water legs are united,--the front water leg being reduced in width near its upper end'to form a passageway for the products of combustion from the fire box into the front transverse flue, and a plurality of inclined water legs which extend between the top member and said front water leg, each of said inclined waterlegs being wider than the one next below it.

8. A sectional boiler comprising two end sections and one or more intermediate sections of which each intermediate section consists of a substantially horizontal top memher and a rear member which connnunicates V freely with the top member and is composed of a rear water leg, an inclined front water leg, a more inclined intermediate water leg which divides the space between the front and rear water legs into two approximately triangular transverse flues which are located one behind the other, and a pedestal in which the lower ends of said three water legs are united said front water legs being narrowednear their upper ends to form pas sageways through which the products of combustion may flow from the fire pot into the front transverse flue,one end member having through it a transverse flue which registers with and places in communication both of the transverse flues in adjacent intermediate member, a plate closing at end of said communicating plate,and the other end member having through it a transverse flue which communicates only with the rear flue in the adjacent intermediate section.

In testimony whereof, I hereunto afiix my signature in the presence of two witnesses.

JOHN B. BERNHARD. Yitnesses H. V. STONE, EVELYN G. FARGO.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

